When considering the TP-Link TL-WN881ND 300Mbps Wireless N PCI Express Adapter, it is important to note that maximum wireless transmission rates are the physical rates derived from IEEE Standard 802.11 specifications.  Range and coverage specifications are based upon test results under normal usage conditions.

Actual wireless transmission rate and wireless coverage are not guaranteed, and will vary as a result of 1) environmental factors, including building materials, physical objects and obstacles, 2) network conditions, including local interference, volume and density of traffic, product location, network complexity, and network overhead and 3) client limitations, including rated performance, location, connection quality, and client condition.

Additionally, the TP-Link TL-WN881ND 300Mbps Wireless N PCI Express Adapter offers compatibility with various Windows operating systems. Frequency Range: 2.400-2.4835GHz; Interface Available: PCI Express(x1); System Requirement: Windows 8(32/64bits) Windows 7(32/64bits) Windows Vista(32/64bits) Windows XP(32/64bits); Wireless Standards: IEEE 802.11n IEEE 802.11g IEEE 802.11b